Mun workspaces

[Wodann]

Similar to Cargo workspaces, we want to allow people to have a Mun workspace.

Effectively, this means that if they use the mun CLI within the workspace:

• it performs the specified command for all Mun packages included in the workspace; and
• compiler output is written to a shared output directory.

Good first issue process:

• [x] read our contributing guidelines
• [x] claim this issue (assign yourself or comment below)
• [ ] implement the feature and start a Pull Request with in the description: closes #531.

If this is your first PR, welcome 🎉 😄

[Wodann]

@baszalmstra are there things we should take into consideration for this?

[alexandrasp]

Hey @Wodann could you assign it to me? And maybe it could be a good idea to add this issue as a step to complete issue #419.

[alexandrasp]

btw, I don't have permission to mark the checkboxes in the description.